\begin{table}
\centering
\begin{tabular}[t]{lccc}
\toprule
  & Model 1 & Model 2 & Model 3\\
\midrule
Graduate & \num{0.046}*** & \num{0.046}*** & \num{0.031}***\\
 & {}[\num{0.040}, \num{0.053}] & {}[\num{0.040}, \num{0.052}] & {}[\num{0.020}, \num{0.042}]\\
Sex & \num{0.004}* & \num{0.004}* & \num{0.004}*\\
 & {}[\num{0.001}, \num{0.007}] & {}[\num{0.001}, \num{0.007}] & {}[\num{0.001}, \num{0.007}]\\
Age & \num{0.001}* & \num{0.000}* & \num{0.000}*\\
 & {}[\num{0.000}, \num{0.001}] & {}[\num{0.000}, \num{0.001}] & {}[\num{0.000}, \num{0.001}]\\
Income (ten cat.) & \num{0.002}* & \num{0.002}* & \num{0.002}*\\
 & {}[\num{0.000}, \num{0.003}] & {}[\num{0.000}, \num{0.003}] & {}[\num{0.000}, \num{0.003}]\\
Children & \num{-0.010}*** & \num{-0.010}*** & \num{-0.009}***\\
 & {}[\num{-0.014}, \num{-0.006}] & {}[\num{-0.014}, \num{-0.006}] & {}[\num{-0.013}, \num{-0.005}]\\
Unemployed & \num{-0.012}*** & \num{-0.012}*** & \num{-0.012}***\\
 & {}[\num{-0.017}, \num{-0.007}] & {}[\num{-0.017}, \num{-0.008}] & {}[\num{-0.017}, \num{-0.007}]\\
Academic\_Freedom at C &  & \num{0.029}*** & \num{0.024}***\\
 &  & {}[\num{0.014}, \num{0.044}] & {}[\num{0.010}, \num{0.039}]\\
Electoral Democracy Score &  & \num{-0.125} & \num{-0.124}\\
 &  & {}[\num{-0.279}, \num{0.029}] & {}[\num{-0.278}, \num{0.030}]\\
GDP pc(log) &  & \num{-0.070} & \num{-0.067}\\
 &  & {}[\num{-0.185}, \num{0.046}] & {}[\num{-0.183}, \num{0.049}]\\
Population (log) &  & \num{-0.082} & \num{-0.079}\\
 &  & {}[\num{-0.514}, \num{0.350}] & {}[\num{-0.511}, \num{0.352}]\\
Academic Freedom at C * Graduate &  &  & \num{0.029}**\\
 &  &  & {}[\num{0.011}, \num{0.047}]\\
\midrule
Num.Obs. & \num{235849} & \num{235849} & \num{235849}\\
R2 & \num{0.171} & \num{0.172} & \num{0.173}\\
R2 Adj. & \num{0.171} & \num{0.172} & \num{0.172}\\
Std.Errors & by: country\_year & by: country\_year & by: country\_year\\
\bottomrule
\end{tabular}
\end{table}
